Learning > presentation > content > Content Instances Of Specific Classes

ContentInstancesOfSpecificClasses Specification

Based on ContentInstancesOfSpecificClassesSpecification interface.

Returns content for instances of specific ECClasses.

Attributes

Name	Required?	Type	Default	Meaning
Filtering
`classes`	Yes	`MultiSchemaClassesSpecification \| MultiSchemaClassesSpecification[]`	`[]`	Classes whose instances should be used.
`handleInstancesPolymorphically`	No	`boolean`	`false`	Whether to also get content from instances of derived `classes`.
`handlePropertiesPolymorphically`	No	`boolean`	`false`	Whether to also get content from properties of derived `classes`.
`instanceFilter`	No	ECExpression	`""`	Condition for filtering instances.
Ordering
`priority`	No	`number`	`1000`	Changes the order of specifications.
Content Modifiers
`relatedProperties`	No	`RelatedPropertiesSpecification[]`	`[]`	Specifications of related properties which are included in the generated content. See this page for more details.
`calculatedProperties`	No	`CalculatedPropertiesSpecification[]`	`[]`	Specifications of calculated properties whose values are generated using provided ECExpressions. See this page for more details.
`propertyCategories`	No	`PropertyCategorySpecification[]`	`[]`	Specifications for custom categories. Simply defining the categories does nothing - they have to be referenced from `PropertySpecification` defined in `propertyOverrides` by `id`. See this page for more details.
`propertyOverrides`	No	`PropertySpecification[]`	`[]`	Specifications for various property overrides. See this page for more details.
`showImages`	No	`boolean`	`false`	Should image IDs be calculated for the returned instances. When `true`, ImageIdOverride rules get applied when creating content.
Misc.
`relatedInstances`	No	`RelatedInstanceSpecification[]`	`[]`	Specifications of related instances that can be used in content creation.
Deprecated
`arePolymorphic`	No	`boolean`	`false`	Same as `handleInstancesPolymorphically`.

Example

{
  "specType": "ContentInstancesOfSpecificClasses",
  "classes": {
    "schemaName": "BisCore",
    "classNames": ["Model"]
  },
  "handleInstancesPolymorphically": true
}

Last Updated: 29 November, 2022